HOUSTON RICK
Member
Not a rip on competent service people out there, but as the old commercial goes, "yesterday I couldn't spell mechanic, today I are one (while hammering on a transmission).
That is so wrong I barely know where to start. The pressure marked on the tire is the maximum it can take with a given load. In theory you can work back from the corner weight and the value of the tire and come up with a workable pressure. But that doesn't take into account the other factors in tire construction that affect how a car rides and handles.
Just because you can fit a particular brand of tire on a given car doesn't mean you should. Those who build high end cars spend billions getting this stuff correct, your Discount Tire tech doesn't.
I have heard that dealer service departments have to keep parts in a locked room with a trusted employee to dispense them to the techs, due to theft.
Also that dealer profit comes more from service than car sales. Just as gas stations make money from the convenience store, not gas sales.
That is so wrong I barely know where to start. The pressure marked on the tire is the maximum it can take with a given load. .
WOW.... that is some deep thought on something I spend five minutes doing twice a year![]()
AFA the billions spent in research to select the OEM
tire, I'd bet it has more to do with who'll give the
vehicle mfr the best deal, than anything else, most of
the time.
What is it with the guys who set tire pressures in dealerships? ... But still, on a car being serviced in a main dealership with a placard that clearly says 32 front, 36 rear, why are the tires variously inflated to 40-41 all round?
It's simply rank incompetence.![]()
Nobody gets it right. Not even the tire shops.
I have a 2500 HD pickup. I run 50 psi in the front and 45 psi in the rear when the truck is empty.
I would tell the service writer that when I took my truck in to have the tires rotated and he would put it on the RO.
I'd pull out of the shop and stop in the closest parking lot and check my tires.
80 psi front and rear every time.![]()
Let me guess, a Ford dealership? Your experience sounds the same as happens to a guy at work.
+1. And they just have to change the radio station to the most atrocious punk rock / heavy metal / death rock / rap station known to man.![]()
And they always put too much air into the tires. When I bought the car, new, they had 45 PSI in all 4 tires.
Also that dealer profit comes more from service than car sales. Just as gas stations make money from the convenience store, not gas sales.
I don't trust those gauges either. The TPM system on the car read 40-41 PSI and that agreed with my "pistol" gauge at home. Besides, there is supposed to be a large differential front to back, so finding them all the same shows it's unlikely to be a bad gauge.
Be careful there John!Steve, I would bet your dollars to donuts …
Last fall I had a part time sales job and I had to rent a car almost every week. The first car really felt "squirrley" on the highway. I pulled over the first chance I got and bought a good mechanical pressure gauge. Two tires were correct, one was 10 lbs. low and the other was 15 lbs. low. I got them all corrected and the car drove fine. Next week a similar problem and solution. After that I checked every time and "corrected" more often than not.
The manager said they never checked tire pressure. A true statement in my experience. Unfortunately they were my only option for rental cars.